[c-nsp] 1.1.1.0/24 and Cisco WLCs

[Tom Storey]

I recall that APNIC, the "unfortunate" custodians of 1.0.0.0/8, had
declared that the two prefixes 1.1.1.0/24 and 1.2.3.0/24 would never be
allocated to an actual customer network, given the extensive use of them in
private network situations like these (1.1.1.1 and 1.2.3.4 respectively
being the two culprits.)

Also IIRC there was some testing done in the past which showed that
announcing those two prefixes resulted in several hundred mbit of rx
traffic, which was one of the factors in that decision. Its a bit unfair to
lob the responsibility of handling all that rubbish traffic on to anyone,
but likely its interesting for research purposes.


On 11 March 2013 15:03, <A.L.M.Buxey at lboro.ac.uk> wrote:

> Hi,
>
> > Maybe. But a lot of people *have* used it, because I've seen it when
> > doing webauth logins e.g. in airports, train networks, etc. And by
> > definition, the people unwise enough to use it are also likely to be
> > the people unwise enough to return and fix things up in the
> > installations they did.
>
> I certainly havent logged in at a hotel using the default
> account after having the cisco login page with 1.1.1.1 address.... nope!
>
> I think there was once a belief that 1.1.1.1 would never be assigned... so,
> rather than accept that it would..and use RFC 1918 space or documentation
> space,
> they went for that. :(
>
> alan
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